Radiation-balanced silica fiber lasers and amplifiers
Abstract/Contents
- Abstract
- In optically pumped lasers, the quantum defect generates heat that causes detrimental fluctuations in the output mode, frequency, and power. Common heat-mitigation techniques use bulky mechanical coolers that introduce vibrations, leading to laser frequency and amplitude noise. Anti-Stokes fluorescence (ASF) cooling is a promising vibration-free alternative that involves pumping the laser's active ions above their mean fluorescence wavelength. Ultimately, this enables the creation of "radiation-balanced lasers", in which the heat generated from lasing is negated by cooling due to ASF. This form of cooling was first demonstrated in 1995 and, since then, there has been extensive research on cooling in crystals and other bulk samples. ASF cooling in fibers, however, remained largely unexplored. This work presents a thorough investigation of ASF cooling in fibers and demonstrates that fibers are viable candidates for applications to practical radiation-balanced fiber lasers. We start by demonstrating cooling in various Yb-doped fiber hosts including silica, which was previously regarded as a highly improbably host for cooling. We then use the best performing silica fiber to make a 22-dBm amplifier with no net heating along the length of the fiber. Then, finally, we present a radiation-balanced silica fiber laser with 115 mW of output power. By eliminating the need for conventional coolers, this result will enable fiber lasers with lower relative intensity noise and greater temporal coherence than possible until now.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2021; ©2021 |
| Publication date | 2021; 2021 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Knall, Jennifer Maria |
|---|---|
| Degree supervisor | Digonnet, Michel J. F |
| Thesis advisor | Digonnet, Michel J. F |
| Thesis advisor | Miller, D. A. B |
| Thesis advisor | Solgaard, Olav |
| Degree committee member | Miller, D. A. B |
| Degree committee member | Solgaard, Olav |
| Associated with | Stanford University, Department of Electrical Engineering |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Jennifer Maria Knall. |
|---|---|
| Note | Submitted to the Department of Electrical Engineering. |
| Thesis | Thesis Ph.D. Stanford University 2021. |
| Location | https://purl.stanford.edu/bz956py2372 |
Access conditions
- Copyright
- © 2021 by Jennifer Maria Knall
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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